SHADOW MOUNTAIN

Washington — Transient Non-Community — PWSID: WA5388382

System Information

PWSID	WA5388382
System Name	SHADOW MOUNTAIN
System Type	Transient Non-Community
Water Source	Ground Water
Activity Status	Active
Owner Type	Private
EPA Region	10
Serves School	No
Wholesaler	No
First Reported	Feb 7, 1981
Last Reported	Dec 11, 2025

Location & Contact

State	Washington
City	SEQUIM
ZIP Code	98382
Address	PO BOX 92
Organization	SHADOW MOUNTAIN
Phone	—

Population & Service

Population Served	656
Service Connections	63

Drinking Water Violations (37)

This water system has 37 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jan 1, 2020	Dec 31, 2020	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2020	Nitrate Rule
Mar 1, 2019	Mar 31, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Mar 31, 2019	Revised Total Coliform Rule
Feb 1, 2019	Feb 28, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Feb 28, 2019	Revised Total Coliform Rule
Jan 1, 2019	Jan 31, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jan 31, 2019	Revised Total Coliform Rule
Jan 1, 2019	Jan 31, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jan 31, 2019	Revised Total Coliform Rule
Dec 1, 2018	Dec 31, 2018	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Dec 31, 2018	Revised Total Coliform Rule
Dec 1, 2018	Dec 31, 2018	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Dec 31, 2018	Revised Total Coliform Rule
Nov 1, 2018	Nov 30, 2018	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Nov 30, 2018	Revised Total Coliform Rule
Nov 1, 2018	Nov 30, 2018	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Nov 30, 2018	Revised Total Coliform Rule
Oct 1, 2018	Oct 31, 2018	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Oct 31, 2018	Revised Total Coliform Rule
Oct 1, 2018	Oct 31, 2018	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Oct 31, 2018	Revised Total Coliform Rule
Jul 1, 2018	Jul 31, 2018	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jul 31, 2018	Revised Total Coliform Rule
Jan 1, 2018	Dec 31, 2018	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2018	Nitrate Rule
Feb 1, 2014	Feb 28, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Feb 28, 2014	Total Coliform Rule
Apr 1, 2012	Apr 30, 2012	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Apr 30, 2012	Total Coliform Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Jan 1, 2007	Dec 31, 2007	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	Nitrate Rule
Sep 1, 2006	Sep 30, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 2006	Total Coliform Rule
Jul 1, 2006	Jul 31, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Jul 31, 2006	Total Coliform Rule
Nov 1, 2005	Nov 30, 2005	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 2005	Total Coliform Rule
Oct 1, 2003	Oct 31, 2003	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 2003	Total Coliform Rule
Jul 1, 2003	Jul 31, 2003	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Jul 31, 2003	Total Coliform Rule
May 1, 1998	May 31, 1998	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	May 31, 1998	Total Coliform Rule
Dec 1, 1992	Dec 31, 1992	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Dec 31, 1992	Total Coliform Rule
Oct 1, 1992	Oct 31, 1992	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Oct 31, 1992	Total Coliform Rule
Sep 1, 1992	Sep 30, 1992	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Sep 30, 1992	Total Coliform Rule
Aug 1, 1992	Aug 31, 1992	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Aug 31, 1992	Total Coliform Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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